1+2+3+4+5+6+7+8+9+10的值是( )
A．55
B．54
C．53
D．52
参考答案：A
内部关系是指导公安机关内部上下级之间、同级与同级之间、警种与警种之间，按照一定规则构成的关系。 ( )
Most creative ideas are laughed at when they are first _____. [ ]
A. put away
B. put off
C. put through
D. put forward
